COMSOL 4.1 Update 3

Released March 9, 2011.

This update corrects several bugs and stability issues in COMSOL 4.1.
The update is cumulative; that is, it applies to both COMSOL 4.1 and the previous COMSOL 4.1
Update 1 and Update 2. The update includes all updates from the previous Update 1 and Update 2.
Update Details.

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Installation

Check your version

Make sure that you run COMSOL version 4.1.0.88, 4.1.0.112 or later. On the Help menu,
click About COMSOL Multiphysics to check your version. If you have an
earlier build number, contact your COMSOL sales representative to get
the official release of COMSOL 4.1 before you proceed.

Download Update

Install

Before you proceed with the installation, make sure to exit any running COMSOL process.

Windows

Run the downloaded .exe-file to extract the update to the COMSOL 4.1 installation directory, for
example C:\COMSOL41.

Linux

Copy the downloaded .zip-file to the COMSOL 4.1 installation directory:

cp comsol_4.1.0.185_linux.zip [installdir]/comsol41

where [installdir] is
the root of the installation, for example /usr/local. Unzip it by the
commands:

cd [installdir]/comsol41unzip -o comsol_4.1.0.185_linux.zip

If you have not disabled SELinux, run the following command:

chcon -t textrel_shlib_t [installdir]/comsol41/lib/[platform]/lib*

where platform is glnx86 or glnxa64.

Macintosh

Double-click the downloaded .dmg file to mount the disk image. In the Finder, open the mounted disk and double-click the COMSOL installer icon. Select your COMSOL installation folder, usually called COMSOL41.

Check your installation

Start COMSOL Multiphysics.

On the Help menu, click About COMSOL Multiphysics.

Check that the version number is 4.1.0.185 (If not, the installation did not succeed).

Update Details

General

*Improved stability for selections.

*Temporary solution files are no longer stored when using a stationary solver.

Updated documentation and improved translations for supported local languages.

Several improvements for parametric curves.

Edge points are now distributed evenly in all cases when meshing.

GUI display for anisotropic tensors is now more intuitive.

Several stability issues in GUI, meshing, solving, results analysis, and backward compatibility have been resolved.

Plot while solving now works as expected in client-server mode, in batch mode, and in the LiveLink™ for MATLAB®.

Corrected several stability issues, and improved performance.

Thin Thermally Resistive Layers is now available also in COMSOL without add-on modules.

Improved performance of Far Field calculations, and corrected equations for Far Field symmetry settings.

A predefined variable for the electric energy density time average, emw.Weav, is now available. The expression for the total energy density, emw.intWe, has also been corrected so that it includes the electric energy in addition to the magnetic energy.

Structural Mechanics Module

*Corrected expression for Boundary Load feature with Load type set to Pressure in the axisymmetric case.

Principal Stress and Principal Strain vector plots in 2D axisymmetric models now show the correct direction.

The stability for contact and friction has been improved.

In the Thermal Stress interface, the display of branch numbers for the Thermal Viscoelastic material has been corrected.

Shells now work as expected also when a thermal load through the thickness of the shell is applied.

Geometric Nonlinearity is now available also for the Thermal Stress and Joule Heating and Thermal Expansion interfaces.